1.truck reverse aid system 2,Display the distance on the screen 3,alarm by English ... . Following is the characteristics of our products: Features & Functions1,Display: 3.5"inch TFT-LCD screen2,Aspect ratio:16:9 ... 7,alarm by english speech 8,Display the distance on the screen truck reverse aid system Parameter voltage9DCV—15DCVRated voltage12DCVPower costMax ... ,8,7,6,5,4,stop truck reverse aid system